Drill-puller.



W. A. COOK.

DRILL FULLER.

APPLICATION FILED MAYIS. 1918.

INVENTOR live/ 65G 71 ATTORNEY Patented Feb. 25, 1919.

STATES PATENT orrion.

,w1LLIs A. COOK, or"nErUnLrc,.wAsHI1\TGTOi\T,'iissienon or ONE-HALF TOALEX. McKA.Y, or nnrunmo wnsnmeron. i

DRILL-FULLER;

To all whom it'may concern: Be it known that I, WILLIS A. 000K, acitizen of the United States, residing at Republi in the county ofFerry'and State of Washington, have invented'new and useful Improvementsin Drill-Pullers, of which the following 'is a specification.

This invention relates to an improved drill pulling device and residesin the construction, combination and operative arrangement of parts setforth in the following-specification and pointed out with'p articularityin what is claimed.

In the drawings,

Figure 1 is an elevation illustrating the application of theimprovement.

Fig. 2 is a plan view of the grip block.

Fig. 3 is a plan view of the puller arm or member.

It is the object of the present invention to dispense with the handmethod of pulling drills, to save the time and labor exerted thereby andto provide an extremely simple but thoroughly eflicient manner whereby astuck drill may be removed in an easy and efiicient manner at a smallamount of time and with a comparatively slight amount of labor upon thepart of the miner.

In Fig. 1 of the drawings the numeral 5 designates a drill bit which issupposed to have been stuck in a hole. The numeral 6 designates a Stoperdrilling machine actuated by compressed air power. When the bit 5 isstuck the chuck 7 of the drilling machine 6 is actuated to release thebit 5. A second bit 8 is then arranged in the chuck of the drillingmachine and is actuated by the drilling machine so that the same isreceived in a comparatively shallow hole in the stratum mine in whichthe bit 5 is stuck. The bit 8 is not an addition to the miners kit butmay be one of the bits usually used. The bit 8 is comparatively short,say about two feet long and is bored in the stratum 9 only a shortdistance away from the bit 5. When the bit 8, which provides the fulcrummember for the improvement, is inserted,-

say about six inches in the stratum 9 the drilling machine 6 is removedtherefrom and is positioned a slight distance to one side of the fulcrumbit 8, the drilling machine 6, the fulcrum 8 and the stuck bit 5 beingarranged in parallelism. In the drilling machine 6 is now secured apulling arm 10, the same including a shank 11 corre- Specification ofLetters Patent.

Patented Feb. 25, 1919.

Application filed May 15, 1918.- Serial No. 284,749.

sponding in'shape to the bits so that the same may be properly engagedby the chuck The'shank 11, at the outer end thereof is provided with-anoffset portion forming with the same what I will term a head and whichis designated by the numeral 12. Thishead, at the outer end thereof ispro- .vided with an opening'13 of a shape corresponding to the cross'sectionalshapeof either of thebits 5 or 8 sojthat the bit 8 will freelyslide through the opening 13, more properly speaking the member 11 willside over the fulcrumbit 8 when the drilling machine is operated, andwill be guided by the said fulcrum member 8. 7

The head 12, at a suitable distance inward of the opening 13 is providedwith an additional opening 14 through which passes one of the end linksof a chain 15, the said end link being engaged by a suitable pin 16 thatis disposed transversely of the slot 14 resting upon the outer face ofthe head 12.

On the lower end of the fulcrum bit 8 is arranged a socket 17 formed onone end of a slotted member, and between the arms 18 provided by theslot in the said member is pivotally secured, as at 19 a wheel 20.Around this wheel the chain 15 is trained, and the free end of the chainis passed through an opening 21 in one end of what I will term a gripblock 22. The referred to end of the chain 15 is engaged by a pin 23,passing through the said link and straddling the opening 21. The gripblock is provided with an opening 24 providing centrally communicatingright angular passages, corresponding to the cross sectional shape ofthe bit 5, through which openings the said bit 5 is passed. The block 22is tilted or canted so that the walls of the opening 24. will firmlygrip the surfaces of the bit 5. The valve 25 of the Stoper drillingmachine is turned to admit air through the flexible tube 26 foractuating the mechanism to move the arm 10 outwardly toward the stratum.9. This, of course, pulls on the chain 15, causing the same to travelaround the wheel 20, causing the grip block to pull upon the bit 5 towithdraw the same from its opening in the stratum. It will be apparentthat the grip block 22 may be adjusted to engage at different points on.the bit 5, and from the foregoing description, when taken in connectionwith the drawings, the simplicity chine", an arm in said machinedesigned to be moved outwardly therefrom, said arml having a head, afulcrum member receiving the head and providing av-guide-for the arm, awheel =on thefulcrum member, a grip block engaging the drill andaflexible ele ment secured to the blockyguided around the Wheel andconnected to the head ofthe arm. a

2. Inga device for the purpose setiorth, the combination with adrillingmachine, of a fulcrum member adapted to beremov-ably secured between abit to bepul led and the drillingmachine,.-'an arm movable through thedrilling machine having an. angle portion providing a head, andsaid-headhaving an opening-receiving the fulcrum member, a

Having thus described the invention, What Wheel removably connected Withfulcrum member, a grip block having an opening therein receiving thebitand designed to be canted-to 'frictionally contact with the bit, and aflexible element secured to the head of the arm and to the grip blockand trained around the Wheel.

3. Ina means for pulling a stuck bit from a hole, the combination With adrilling machine, an arm having an angle end and a shank received in themachine and longitudinally movable thereby, saidarm having an opening, afulcrum member received in this opening, a Wheel on said fulcrum member,a grip block having an opening thereon designed to receive'the bit tobepulled, and to be canted to frictionally engage with said bit, and aflexible element associated With said grip block trained around theWheel of the fulcrum member and connected with the arm. 7

In testimony whereof I aflix my signature.

WILLIS A. COOK;

Copies of thispatent-mayhe obtained fqrfive cents each, by addressingthe Commissioner of ratents,

Washington, D. G. r

